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You're reading from  Learning PowerCLI - Second Edition

Product typeBook
Published inFeb 2017
Publisher
ISBN-139781786468017
Edition2nd Edition
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Robert van den Nieuwendijk
Robert van den Nieuwendijk
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Robert van den Nieuwendijk

Robert van den Nieuwendijk is an IT veteran from the Netherlands with over thirty years of experience in Information Technology. He holds a bachelor degree in software engineering. After working a few years as a programmer of air traffic control and vessel traffic management systems, he started his own company Van den Nieuwendijk Informatica in 1988. Since then he has worked as a freelance systems administrator of OpenVMS, Windows Server, Linux, and VMware vSphere systems, for Dutch governmental organizations and cloud providers. During winter he is also a ski and snowboard instructor at an indoor ski school. With his background as a programmer, he always tries to make his job easier by writing programs or scripts to perform repeating tasks. In the past, he used the C programming language, OpenVMS DCL, Visual Basic Script and KiXtart to do this. Now, he uses Microsoft PowerShell and VMware PowerCLI for all of his scripting work. Robert is a frequent contributor and moderator at the VMware VMTN Communities. Since 2012 VMware awarded him the vExpert title for his significant contributions to the community and a willingness to share his expertise with others. He has a blog at http://rvdnieuwendijk.com where he writes mainly about VMware PowerCLI, Microsoft PowerShell, and VMware vSphere. If you want to get in touch with Robert, then you can find him on Twitter. His username is @rvdnieuwendijk. Robert is also the author of Learning PowerCLI, Packt Publishing.
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Using arrays and hash tables


In PowerCLI, you can create a list of objects. For example, red, white, and blue is a list of strings. In PowerShell, a list of terms is named an array. An array can have zero or more objects. You can create an empty array and assign it to a variable:

PowerCLI C:\> $Array = @()

You can fill the array during creation using the following command line:

PowerCLI C:\> $Array = @("red","white")

You can use the += operator to add an element to an array:

PowerCLI C:\> $Array += "blue"
PowerCLI C:\> $Array
red
white
blue

If you want to retrieve a specific element of an array, you can use an index starting with 0 for the first element, 1 for the second element, and so on. If you want to retrieve an element from the tail of the array, you have to use -1 for the last element, -2 for the second to last, and so on. You have to use square brackets around the index number. In the next example, the first element of the array is retrieved using the following command...

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Learning PowerCLI - Second Edition
Published in: Feb 2017Publisher: ISBN-13: 9781786468017

Author (1)

author image
Robert van den Nieuwendijk

Robert van den Nieuwendijk is an IT veteran from the Netherlands with over thirty years of experience in Information Technology. He holds a bachelor degree in software engineering. After working a few years as a programmer of air traffic control and vessel traffic management systems, he started his own company Van den Nieuwendijk Informatica in 1988. Since then he has worked as a freelance systems administrator of OpenVMS, Windows Server, Linux, and VMware vSphere systems, for Dutch governmental organizations and cloud providers. During winter he is also a ski and snowboard instructor at an indoor ski school. With his background as a programmer, he always tries to make his job easier by writing programs or scripts to perform repeating tasks. In the past, he used the C programming language, OpenVMS DCL, Visual Basic Script and KiXtart to do this. Now, he uses Microsoft PowerShell and VMware PowerCLI for all of his scripting work. Robert is a frequent contributor and moderator at the VMware VMTN Communities. Since 2012 VMware awarded him the vExpert title for his significant contributions to the community and a willingness to share his expertise with others. He has a blog at http://rvdnieuwendijk.com where he writes mainly about VMware PowerCLI, Microsoft PowerShell, and VMware vSphere. If you want to get in touch with Robert, then you can find him on Twitter. His username is @rvdnieuwendijk. Robert is also the author of Learning PowerCLI, Packt Publishing.
Read more about Robert van den Nieuwendijk